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That may be true but the FACT is the automotive style relays used in the EESS can and have failed many times and they are not "cheap" the last one I replaced was made in Germany as best I can remember, AGAIN not saying it is a bad idea, in fact it is the only cost effective way to replace the...

I would expect a box with high quality relays would be very dependable, but when you use a relay to switch on and off a DC load material is transferred from one contact to the other, eventually this causes a high resistance between the contacts which makes the problem worse until it can no...

The most common failure point is the FETs that short and blow out the glow plugs and or blow themselves up.

It does not require an engineer to figure out what the EESS does, the basic functions can be done with two relays, in fact one of the functions is already done with a relay or relays depending on the model EESS, and that relay is one of the failure points on the EESS, the only way to make it...

No self regulating glow plugs, the afterglow on the HMMWV is PWM thus the reason to use FETs

Do you have an approximate price point?